Have the stack overflow code use the correct stack size set by the platform/thread.h

platform/thread_macos.cc

Index: platform/thread_macos.cc
===================================================================
--- platform/thread_macos.cc	(revision 8702)
+++ platform/thread_macos.cc	(working copy)
@@ -71,12 +71,7 @@
   result = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
   RETURN_ON_PTHREAD_FAILURE(result);
 
-#if DEBUG
-  const int kStackSize = (128 * KB);
-#else
-  const int kStackSize = (64 * KB);
-#endif
-  result = pthread_attr_setstacksize(&attr, kStackSize);
+  result = pthread_attr_setstacksize(&attr, Thread::GetMaxStackSize());
   RETURN_ON_PTHREAD_FAILURE(result);
 
   ThreadStartData* data = new ThreadStartData(function, parameter);
@@ -118,6 +113,12 @@
 }
 
 
+intptr_t Thread::GetMaxStackSize() {
+  const int kStackSize = (256 * KB);
+  return kStackSize;
+}
+
+
 Mutex::Mutex() {
   pthread_mutexattr_t attr;
   int result = pthread_mutexattr_init(&attr);